How each AI engine picks brands

ChatGPT names brands it can corroborate at answer time. With browsing active it searches the web, reads the results, and favours brands appearing consistently across independent sources. Without browsing it relies on training-data patterns, which reward brands with a large, consistent published footprint built up over years.

Sources: Live web search when browsing is active; training memory otherwise

Perplexity searches the live web for every question and cites the pages whose passages most directly answer it. It favours a clear answer near the top of a page, a visible recent date, and tight topical focus — a narrow page that answers precisely regularly beats a broader, more authoritative one.

Sources: Live web search on every query

AI Overviews run on Google's core ranking and quality systems, then select passages through query fan-out — splitting one question into several sub-queries and retrieving a passage for each. Because selection happens at passage level, most cited pages do not rank in the organic top ten for the original query.

Sources: Google's core index, selected by query fan-out

Gemini grounds its answers in Google Search, so the pages it draws on are broadly those Google can retrieve and trusts. Presence in Google's index, clear entity signals, and corroboration across independent sources are what decide whether Gemini names a brand when a user asks for options.

Sources: Google Search grounding

Claude answers from training memory by default and searches the web when the question needs current information. It is notably conservative about unverified claims — where evidence about a brand is thin or conflicting, it will hedge or decline to recommend rather than guess, which makes corroboration unusually important.

Sources: Web search when enabled; training memory otherwise

Copilot is grounded in the Bing index, which makes Bing visibility the prerequisite most brands overlook. A site well optimised for Google but never submitted to Bing Webmaster Tools can be substantially less visible in Copilot than its Google performance would suggest.

Sources: Bing index

Grok retrieves from the live web and, distinctively, from real-time social posts on X. That makes current discussion a much stronger input than on other engines — a brand being actively talked about can surface here well before the rest of the web has caught up.

Sources: Live web and real-time social posts